This formula is from a friend of mine --- and I fixed it up for him. But I can't seem to figure out of how to get the right sine calculations per angle. Can someone please help me in getting the right commands in the sin part?
Code:
#include<stdio.h>
#define PI 3.141592653589
#define NUMBER_OF_TERMS 10
double factorial(double x)
{
double counter, total;
counter=x;
total=x;
while(counter>1)
{
counter--;
total = total * counter;
}
return total;
}
double power(double x, double y)
{
double counter, j;
counter=0;
j = x;
while (counter<(y-1))
{
counter++;
x = x * j;
}
return x;
}
double cosine_func(double radians)
{
int counter, x;
double cosine;
x=0;
counter=0;
cosine = 0;
while(counter<NUMBER_OF_TERMS-1)
{
counter++;
x=x+2;
if(counter%2 == 0)
{
cosine = cosine - (power(radians, x)/factorial(x));
}
else if(counter%2 != 0)
{
cosine = cosine + (power(radians, x)/factorial(x));
}
}
return cosine;
}
double sine_func(double radians)
{
int counter, x;
double sin;
x=0;
counter=0;
sin = 0;
while(counter<NUMBER_OF_TERMS-2)
{
counter++;
x=x+3;
if(counter%2 != 0)
{
sin= sin -(power(radians, x)/factorial(x));
}
else if(counter%2 != 0)
{
sin= sin + (power(radians, x)/factorial(x));
}
}
return sin;
}
main()
{
double counter;
double x_angles;
double x_radians;
double cosine;
double sin;
printf("11526769\n\n");
printf("x(degrees)\t x(radians)\t\t cos x\t\t sin x\t\t");
counter = 0;
x_angles = -185;
while (x_angles<180)
{
counter++;
x_angles+=5;
x_radians=x_angles*PI/180.0;
cosine=1-cosine_func(x_radians);
sin=x_radians-sine_func(x_radians);
printf("%.2lf\t\t%.12lf\t\t%.12lf\t\t%.12lf\n", x_angles, x_radians, cosine, sin);
}
return 0;
}
